Light-concentrator



P. NADELSON. LIGHT CONCENTRATOH. APPLICATION F|1D MAR.22, 1,919.

Ngs

2 SHEETS-SHEETVL Patented Feb. 24, 1920.

PJNADELSON LIGHT CONCENTRATOR. APPLICATION FILEI) MAR. 22. V1919.

VPatented Feb. 24,1920.

2 SHEETS-SHEET 2.

FIG-4.

mw m SH01/11 m v nating substantially all of those rays of light which with the present reflectors rise Unrri'zr) sTAfrEs PATET OFFICE.

PHILIP NADELsoN, or YoNKEns, Nnwro'nn LIGHT-CONCENTRATOR.

Application filed March 22, 1919.v Serial No. 284,322.

To all 'whom t may concer/n.'

Be it known that I, PHILIP NADELsoN, a

citizen of the United States of America, re-` adapted for use in conjunction with a bowlshaped or substantially parabolic reflector for the purpose of concentrating the light from a lamp or light source placed in said reflector, whereby the rays of light are projected withincertain areas. p

The light from ordinary reflectors of headlights, etc., passes through the entire 180o ofthe arc in front of the reflector, thus causing considerable glare detrimental to drivers of approaching vehicles and pedestrians, as is well known.

The primary object of the present invention is to provide a cheap and efficient means for eliminating the glare of the light from headlights, searchlights or the like by eli-miabove -the 900 mark 'of an arc in front of the reflector and. below' the 135o mark of and concentrates, by reflecting back into` said ordinary reflector, those rays that are desired to be eliminated, namely, those above the 90 mark and those below the 135 mark.

With the Aabove general objects in view and others that will become'apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of elements hereinafter more fully described, shown in the accompanying drawing and claimed.

In the drawings, forming part of this specification wherein like referencel characters indicate corresponding parts throughout the several views, v

Figure 1 is a verticalsectional view of a headlight provided witha concentrator constructed in accordance'with the present invention and taken substantially upon line I--I of Fig. 2,

- Fig. 2 is a front elevational view of the device shown in Fig. l with the lens removed,V

' `Specification of Letters'latent.

.clined position as shown in Fig. 1.

Patented Feb. 24, 1920.

.Fig 3 is an enlarged fragmentary sectional detail view illustrating the cup for rendering the source of light invisible to the eye and its adjustable connection to the concentrator plate,

Fig. 4 is a' central vertical sectional view of a modified form of the inventiontaken substantially upon line IV-IV of Fig. 5,

Fig. 5 is a front elevational view of the device shown in Fig. 4^,

Fig. 6 is a somewhat diagrammatic view similar yto Fig. 1 drawn von' a smaller scale and illustrating the use of a second small reflector and lamp in the lower portion of the reflector of the main lamp,

Fig. 7 isY aview similar to Fig. 6 also showing a second smaller lamp in the lower portion of the main reflector employed in conjunctionwith a second cup for rendering the second source of light or the smaller lamp invisible,

Fig. 8 isa view similar to Fig. A 7 with the second` smaller lamp mounted in a different position, and

Fig. 9 is a view similar to Fig. 1 showing a modified form of the attaching means for the concentrator plate.

.Referring more in detail to the several views, the present invention contemplates the modification of the reflector '5 Yof the u sual headlight or the like to concentrate light rays within a desired area so as to yeliminate glare. This object is accomplished bypositioning an oqaque reflecting plate 6 within the reflector 5 between the lens 7 and incandescent lamp 8 at an outward angle of substantially 45, the reflecting plate or concentrator member 6 being preferably of concave or outwardly dished form with its upper straight edge 9extending entirely from side to side of the reflector 5 entirely within the plane of the transverse or horizontal diameter of the open mouth of the Ireflector 5. The plate 6 may be formed in various ways either as an attachment for the usuaLreflector 5" or as an integral part thereof. However, I prefer to form the same separate from the reflector 5 and to provide the lower curved edge thereof with a plurality of angularly bent lugs 10 which are arranged to flatly engage the inner surface of the reflector 5 at suitalbly spaced points and which are apertured to receive bolts 11 or other suitable fastening means to secure the plate 6 in its operative inupper portion of the-lens 7:'at a downward inclination together with the rays of light which initially pass from the source of light i front of the lamp S su stantially at or slightly above the medium line of the re. flector 5 so as to be in the path of the direct rays of the lamp 8 and thereby Substantially The cup 12 isv preferably provided with a highly polished concave surface of the plate 6 or that surdownwardly passing direct rays fronrthe.

'lamp are reflected to the upper portion-` of" the reflector 5` and then pass through the 8 .to 'the' upper portionof the -reflector 5. In this way, very little lightis lost and 4all of the rays-'are more or less reflected outwardly'ofthe reflector 5 through the upper portion of the lens 7 to provide aconcentrated brilliant beam of light sov directed as to be entirely devoid of glare.l

. Invsome instances, especially where high powered lamps are` used, it isalso necessary to yprovide some means for cutting oft' the direct rays from the lamp 8`so as to render the light source invisible. In order to` accomplishthis object, I provide the concentrator plate 6 with a cu 12 arrangedl in renderv the latter invisible.

inner or concave face so as to refiect the .Y direct rays of light in various paths toward the reflector 5 so as to eventually pass through. the upper portion of the lens 7.

-As shown in Figs. 1 to 3 inclusive, the cup 12 is separate from the plate 6 and adj ustably connected thereto so as to be shifted into the bowl of reflector 5 the required depth, but provided with means so that the cup may be maintained at the same height in said reflector 5. This adjustment is preferably obtained by providing the plate 6 with a pair of rows of alined apertures 13, each row being equally spaced from thevertical center of the plate 6 and being of a size to receive the bolts 14. An angle Washer 15 is placed upon each ofthe bolts `14 at opposite sides of the plate 6 so as to -'maintain the bolts 14 in a vertical position- A plurality of washer 16 are then slidably positioned' upon the opposite projecting ends of the bolts 14 in contacting relation with each other and the adjacent faces of the angle washers 15. The lower ends of bolts 14 are provided with a suitable lock Washer 17 and nut 18 to maintain the parts assembled and the upper end of saidbolts extend through the lower edge of cup 12 in which position said cup is fastened by lock washers 19 and nuts 20. Ifit is desired to shift the cup 12 from its full line position as shown in Fig. 1 to its dotted line position .in said figure, it is simply necessary to remove the washers 17 and 19 and nuts 18 and 20 so that the angle washers 15 and ordinary washers 16 upon the lower projecting ends of the bolts 14 may be slidably removed and said bolts then withdrawn from the in thevdesired apertures and some of the washers 16 placed upon .the upper lends of bolts 14 that were-formerlyupon the lower 'ends thereof after whiclrthe washers r17 and 19 and nuts 1S and" 20 are again placed upon the eXtreme ends of. bolts 14 so that the cup is' maintained in proper position or at ,the desired height and depth within the reflector 5.5

japertures 13. The bolts` are then inserted As shown in Figs. 4 and 5,`tl1e plate 6 and 1 the cup 12 may 'be formed from'a single piece of material by a stamping and shaping or other operation, it being understood that the general form ofthe cup and-plate in these figures is substantially the same as that of the device shown in Figs. 1 to 3 inelusive.- l

-By disposing the-.plate 6 or 6Qwitl1in reflector 5 at substantially an angle of 450, an i unused chamber or space 21 is; provided. in the lower portion of the reflector 5. As

shownin'Figs. 6 to 8 inclusive, this space l21 may be variously utilized'to form a secondary'li'ght chamber, thus' makin la multiple beamlamp or headlight. -In Tig. 6, this is accomplished by. suitably fastening a small refiector 22 within'thech-amber 21',y which reflector 22 is provided'witha small'A incandescent lamp 23.

4 In Fig. 7, the second and small 23 is s hown as fastened directly to the main reflecto r5 and a cup 12 smaller-than but similar to'""the cup 12 ofFigQfly is supported from the plate '6, so as to render the source of light or lamp 23 invisible.

Substantially the same construction as shown in, Fig. 7 is. also shown inf-Fig'.

los

8 with the exception that the small lamp23',}

23 invisible being also shown in this figure as supported from the plate 6.

' The secondary lamp in Figs. 6 to 8 inclusive is often desirable when only a slight amount of light is required and will be found useful in various other respects.. The present invention will be foundl useful on automobile, motorcycle, train, car, boat or other lights, 'and while the form of the plate 6 is herein shown and describedas concave it is obvious that the same may be otherwise shaped and still provide more or less efiicient results in accordance with the objects of the invention. I

It is believed that the construction and operation of the present invention will be readily understood from the foregoing devmay, as shown, be fastened to or mounted shown and described are what are believed to be the preferable embodiments thereof,

it is nevertheless to be understood that minor changes may be made in the form, arrangement and combination of parts without departing from the spirit and scope of the in vention as claimed.

In Fig. 9, the plate 6 is shown as provided with a tab or extension 24 which is curved to lie against the inner face of the reflector 5 and which is extended upwardly from the lower edge of said plate 6. The free end of the tab 24 is apertured for reception on the base *.aof the lamp 8 whereby the device is suspended in the operative position jshown, and in order to secure the same against shaking or other movement, a collar 25 is slid onto the base -aand secured by a set screw 26 so as to firmly clamp the end of the extension 24 against the reflector 5.

The term at an outward angle is herein used to denote the arrangement of the plate 6 or 6 with its free edge 9 nearer the lens 7 and the axis of the reflector 5 than the other edge thereof so that the plate is positioned as shown in Fig. 1 infront of the light source 8.

What I claimas new is :h

1. A concentrator attachment for headlight or other concaved refiectors having a sourceof light comprising a substantially semicircular plate adapted for attachment to an ordinary reflector so as -to` be disposed therein at an outwardly and upwardly eX- tending angle of substantially said plate being provided with a reflecting inner sur` face, and a cup associated with said plate arranged to render the source of light invisible, said cup being adjustable toward and away from the source of light without varying the height thereof.

2. A concentrating attachment for substantially parabolic reflectors and' adapted to substantially close one-half of the latter comprisingl a substantially semicircular plate adapted for attachment to and within said reflector at an angle and provided with vertically alined perforations therein adjacent the vertical center thereof, a reflecting concave cu a bolt detachably fastened thereto, an means to fasten said bolt and cup to said plate with the bolt extending through a desired one of said perforations whereby the bolt may be adjusted through said perforations to vary the'height of said cup relative to the plate.

3. A concentrating attachment for substantially parabolic refiectors and ada ted to substantially close the lower half o the latter comprising a substantially semicircular plate adapted for attachment to and within said reflector at an angle and provided with vertically alined perforations therein Vadjacent the vertical center thereof,

a reflecting concaye cup, a bolt detachably fastened thereto, and means to vfasten said bolt and cup to said plate with the bolt eX- tending through a desired one of saidperforations whereby the bolt may be adjusted through said perforations to vary the height of said cup relative to the plate, said means including ordinaryv washers and a pair of angle washers adapted for' slidable reception by and upon said bolt.

4. The combination with a substantially parabolic reflector having a light source centrally positioned therein,`of,a concentrator plate arranged within said reflector at an outward angle of substantially 45 and being of a size to prevent the light of Said source from passing through substantially an entire one half of the headlight lens whereby an unused chamber is provided in a portion of said reiiector forwardly of the concentrator plate, a secondlight source' positioned within said chamber, and a cupsupported by said plate within said chamber to render the second source of light invisible.

In testimony whereof I aHiX my signature.

- PHILIP NADELSON. 

